Let's lint the app/test/ files
fix(tests): Fix the jshint errors and warnings in all of the tests.

* Remove all of the remaining `global: *` declarations
* Remove or comment out all veriables that are "defined but never used"
* Use dot notation where it is "better" (very subjective)
* Make unreachable code reachable.
A couple more tweaks from Shanes meta-PR
fix(tests): Add a missing semicolon.
Merge pull request #1072 from mozilla/molint-moproblems

Molint moproblems

Travis is green. I'm merging. Thanks for this effort @pdehaan!
fix(client): Fix the "Sign in" link on `/confirm_reset_password` if the user is in the force auth flow.

* The user should be returned to /force_auth instead of /sign_in

fixes #926